<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container {
            width: 100%;
            overflow: hidden;
            font-size: 20px;
            color: aqua;
        }

        .left {
            float: left;
            width: 100%;
            height: 200px;
            background-color: rgb(124, 43, 57);
            margin-right: -300px;
        }

        .content {
            margin-right: 300px;
            line-height: 200px;
        }

        .center,
        .right {
            float: right;
            width: 150px;
            height: 200px;
            line-height: 200px;
        }

        .center {
            background-color: rgb(44, 177, 11);
        }

        .right {
            background-color: rgb(27, 155, 123);
        }
    </style>
</head>

<body>
    <div class="container">
        <div class="left">
            <div class="content">左侧自适</div>
        </div>
        <div class="center">中间固定</div>
        <div class="right">右侧固定</div>
    </div>
</body>

</html>